java (method)

Method definition

public static void hello() {           //①
   System.out.println("Hello")     //②

① Statement of important matters (method name is hello) ② Processing content

Use of arguments

public static void main(String[] args) {
     System.out.println("Call the method");
     System.out.println("The method call is finished");
public static void hello(String name) {  
     System.out.println(name + "Kun, Hello");

① Pass A, B, C and call the hello method (2) String variable: Declare name ③ Actual argument: A.B.C Formal argument: name ** Actual display ** A-kun, Hello B-kun, Hello C-kun, Hello

How to pass arguments

If nothing is passed: Method name () When passing one value: Method name (value) When passing multiple values: Method name (value, value, ...) (In case of multiple, use by separating with comma,)

Use of return value

return Return value;

** Notes on return statement ** It also terminates the method. Even if you write a process after the return statement, it will not be executed.

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